Improvement in millstone bails and drivers



itiidr iatea @will @da ALBERT Gr.` WAIIDO, l.OF MILWAUKEE, 'WISCONSIN Letters Patent No. 111,704, dated February 7, 1871.

i IMPROVEMENT IN MILLs'roNE BAILsANo DRIVERS.

The Schedule referred to in these Letters Patent and making part of the same.

- ers, and consists in the novel construction and urrangement of rubber springs between suitable lugs 'arranged correspondingly and respectively on the interiorot the bail and the periphery of the driver, as hereinafter explained, by means of which a cheap,

simple, and convenient yielding mechanical device is provided,'for preventing sudden jars between the drivers and the millstone, and which allows of. ready adj ustment fordriving the stone in either direction, and permits the stone to be perfectly balanced.

In the drawing- Y Figure 1 is a vertical cross-sectionv ou the line :t a: offig.2, and i Figure 2 is a bottom plan view-with a portionin cross-section.

In constructing my device I make a millstone hail, C, of any size desired, with exterior lugs D for attaching it to, and within, the eye of a millstone.

In the center of this bail C is placed a steel thim- .ble, L, to receive a steel point or cock-head K, in the end of a spindle, A, all as clearly'shown in iig. l, the spindle being connected to the driving-machinery of the mill.

' On the interior of lthe bail C are arranged two or more lugs F, having circular recesses a in both sides,

. as shown in iig. 1, and in dotted lines in g. 2, to re`A ceive the ends of solid cylindrical rubber springs H. These springs H are fastened intheir seats by iron .rods J, which pass through a circular metallic plate or disk, G, on the front end of the spring, then onthrough the spring and the lug to thezrecess on its opposite side, where it is secured bya nut and washer, b, as clearly seen in iig. 2,

The circular plates G on the end of' the springs may be a little less in diameter than the springs, and the head of the bolt which secures them should be made to be flush with their outer surface, as shown in the saine gure.. v

The driver B, through which the spindle A passes, is provided with the same number of lugs E on its periphery as are arranged on the interior of the bail C, whetheril two or more,` and` they are also provided with circular recesses c on each side, as shown in iig. l, and in detted lines in Iig. 2.

The lugsE upon the driver B are so arranged that the-recesses will .come immediately opposite the outer ends of the springs and allow the met-al disks -G to impinge orv bear against their inner surface, as clearly shown in the sectional portion of fig. 2. l

By this] arrangement it will be seen that, as the driver revolves, its lugs are brought to bear-against the rubber springs which interpose the requisite yielding mechanicaL device to prevent the jar that is always occasioned by sudden positive -movements.

It willalso be seenthat the position of the rubbers can at any time be readilyfvreversed and the stone driven iuithe opposite directionfwhen desired, and that, because of the position ofthe lugs on the bail and driver, that the stone can be perfectly balanced.

While two rubber springs maybe used-with the corresponding 'number of lugs on the bail and on the driver, orImore if desired, I have found that the best results were secured by the use of four, with the lugs arranged as shown in the'drawing.`

Having thus describedfmy invention, What II claim,is

l. The lnillstone bail C, and driver Iincombination with the adjustable rubber` springs H, when constructed yand arranged substantially as herein described, ffor the purpose of interposingthe rubber springs to the rightoi left between the bail and its driver, as set forth.

, 4i?. ln combination with a drivel', B, provided with lugs E, a bail, C, having interior lngsF, with rubber springs `H attached thereto, when constructed and arranged ,to operate substantially as herein described,

'and for the purpose set forth.

Witnesses W. W. YALE, G. O. MAsKrRAlN.

ALBERT G. WALDO. 

